I think I already know my answer but just need some confirmation from my fellow experts 
I have a PO already established and the supplier has the part in the supplier price list. There was not a Lead Time on the Part when created in the Price List so not LT in price list. That means the PO does not show the Lead Time because the Price List does not have one. When I updated the Lead Time it did not update the Price List. I had to expire that entry and create a new one which then pulled in the new Lead Time. It is my understanding that it will not update the Price List or PO because it was established before the Part had a Lead Time. Is this correct? I hope I asked or explained this well.
thanks Kim